Novel caput femoris windowing bone grafting tool

Abstract

The utility model discloses a novel caput femoris windowing bone grafting tool which comprises a connecting square tube, a matching square tube and a windowing bone grafting square tube, the lower portion of the matching square tube and the upper portion of the windowing bone grafting square tube are both inserted into the connecting square tube in a vertical sliding fit mode, a holding handle is fixed at the top end of the matching square tube, and the upper portion of the matching square tube is connected with the windowing bone grafting square tube. The upper end and the lower end of the windowing bone grafting square tube are respectively a bone grafting end which can be aligned and inserted into the bone grafting window and a windowing end which can be used for pressing down and windowing the femoral neck. The bone grafting device has the advantages that the holding handle and the windowing bone grafting square tube are detachably combined at the upper position and the lower position of the connecting square tube through the combination connecting pieces respectively, and then the holding handle is hammered to drive the downward windowing end of the windowing bone grafting square tube to press down on the femoral neck, so that a rectangular bone grafting window can be directly chiseled in the femoral neck position; a windowing operation mode of sequentially chiseling four edges is replaced, and the accurate size and good regularity of the bone grafting window are ensured.

Description

Technical Field

[0001] The utility model relates to the field of auxiliary tools for treating femoral head necrosis, in particular to a novel femoral head window bone grafting tool. Background Art

[0002] The treatment of femoral head necrosis is one of the common and difficult-to-treat diseases in orthopedics. Although artificial joint replacement has made great progress and the service life of artificial joints is 10-20 years, even in the most ideal situation (fourth-generation ceramic joints that can be used for 30 years), it is impossible to ensure that young patients' artificial joints can be used for life. Total hip replacement is only an option for late-stage treatment, so hip preservation treatment is particularly important.

[0003] In the hip preservation treatment plan, bone grafting is a surgical method to preserve the femoral head. Bone grafting is a commonly used surgical treatment method for avascular necrosis of the femoral head and is suitable for young cases of early femoral head necrosis. Bone grafting can be divided into vascularized bone grafting and non-vascularized bone grafting. Specifically, non-vascularized bone grafting is simpler and easier to perform, and is more widely used clinically. At the same time, its purpose is to reduce intraosseous pressure, provide structural support to the subchondral bone and articular cartilage, and improve the late deformity of the collapsed femoral head.

[0004] Specifically, during the bone grafting operation, a windowing tool is required to open a femoral neck window in the dislocated femoral head, and then a bone grafting tunnel is used to deliver the bone graft to the femoral head window. This results in: 1. When opening the femoral neck window, the existing windowing tool usually chisels away the four sides in sequence. First, the size and regularity of the bone grafting window are difficult to ensure. At the same time, it is difficult to completely clean out the chiseled bone after the window is opened, and special cleaning is required, which directly affects the subsequent bone grafting operation.

[0005] 2. Since two tools, window opening and bone grafting, are required, two different tools need to be prepared. This makes it difficult to ensure accurate alignment of the bone graft tunnel and window opening during tool replacement, which can easily cause the bone graft to be introduced with deviation and inaccurate position. Utility Model Content

[0006] The purpose of the present utility model is to provide a new femoral head window bone grafting tool in order to solve the above-mentioned problems. A holding handle and a window bone grafting square tube are detachably combined at the upper and lower positions of the connecting square tube through a combination connecting piece. Then, by hammering the holding handle to drive the window end of the window bone grafting square tube facing downward to press down the femoral neck, a rectangular bone grafting window can be directly chiseled out at the femoral neck position, replacing the windowing operation method of chiseling out the four sides sequentially. See the following for details.

[0007] To achieve the above objectives, the present invention provides the following technical solutions:

[0008] The utility model provides a new femoral head window bone grafting tool, comprising a connecting square tube, a matching square tube and a window bone grafting square tube, wherein the lower portion of the matching square tube and the upper portion of the window bone grafting square tube are both inserted into the connecting square tube in a vertical sliding fit manner, and a holding handle is fixed to the top of the matching square tube;

[0009] The upper end and the lower end of the fenestration bone grafting square tube are respectively a bone grafting end capable of aligning and inserting into the bone grafting fenestration and a fenestration end capable of pressing down the femoral neck to perform a fenestration operation;

[0010] Combined connectors are provided at upper and lower positions on both sides of the connecting square tube, and the matching square tube and the window bone grafting square tube are detachably connected to the connecting square tube through the corresponding combined connectors.

[0011] Preferably, the top and bottom sides of the windowed bone grafting square tube are respectively provided with windowed limiting grooves and bone grafting limiting grooves, and the combined connecting piece can make the connecting square tube and the windowed bone grafting square tube detachable and pluggable by respectively cooperating with the windowed limiting grooves and the bone grafting limiting grooves.

[0012] Preferably, handle limiting grooves are provided on both sides of the mating square tube, and the combined connector can make the connecting square tube and the mating square tube detachable and pluggable by cooperating with the handle limiting grooves.

[0013] Preferably, the combined connecting parts include a toggle opening and a toggle spring, and the upper and lower positions on both sides of the connecting square tube are provided with toggle openings, and the inner edge of the toggle opening is fixedly connected with the toggle spring that can be toggled for deformation and automatically restored. The inner surface of the toggle spring is fixed with a limiting protrusion, and the limiting protrusion is away from the position where the toggle spring is fixedly connected to the connecting square tube, and the limiting protrusion at the upper position is respectively immersed in the handle limiting groove, and the limiting protrusion at the lower position is respectively immersed in the window limiting groove.

[0014] Preferably, the distance between the bone grafting limiting groove and the outermost end of the window end is equal to the distance between the window limiting groove and the outermost end of the bone grafting end, so that when the bone grafting end and the window end are respectively plugged into the connecting square tube, the window limiting groove and the bone grafting limiting groove can be respectively engaged by the limiting protrusion at the lower position.

[0015] Preferably, the windowed bone grafting square tube is a rectangular straight tube, and the bone grafting end of the windowed bone grafting square tube is a flat end face, and the windowed end of the windowed bone grafting square tube is an oblique end face or a curved end face with a protruding edge.

[0016] Preferably, a plurality of elastic barbed spikes are fixed on the inner periphery of the window bone grafting square tube near the window end.

[0017] The above-mentioned new femoral head window bone grafting tool is used, specifically in the process of using it in the femoral head window bone grafting surgery, because the upper and lower positions of the connecting square tube are detachably combined with the holding handle and the window bone grafting square tube through the combined connecting piece, and then the holding handle is hammered to drive the window end of the window bone grafting square tube facing downward to press down the femoral neck, so that a rectangular bone grafting window can be directly chiseled out at the femoral neck position, replacing the window operation method of chiseling out the four sides in sequence, thereby ensuring that the bone grafting window has The accurate size and good regularity facilitate the window opening operation process, and since the inner periphery of the window end of the window bone grafting square tube is provided with the barbed elastic thorn piece, after the window opening operation is completed, the barbed elastic thorn piece will sink into and hook the outer edge of the chiseled bone, thereby ensuring that when the window bone grafting square tube is withdrawn after the window opening is completed, the window end can completely clean out the chiseled bone. The method for cleaning and removing the chiseled bone is simple and easy to implement, which further facilitates the window opening operation process. Afterwards, the connecting square tube and the window bone grafting square tube can be separated by the way that the limiting protrusion of the combined connecting piece disengages from the window limiting groove, and then the window bone grafting square tube is turned around to adjust the bone grafting end of the window bone grafting square tube to a downward state. Since the window bone grafting square tube is a straight tube in the vertical direction, the bone grafting end can be matched with the bone grafting window by cooperating with the bone grafting window, so that the window bone grafting square tube can be inserted after accurate alignment with the bone grafting window, thereby facilitating the direct use of the window bone grafting square tube as a bone grafting tool. The bone grafting tunnel is used to introduce the bone grafting bone, thereby avoiding the deviation and inaccurate position of the bone grafting bone during introduction. In this way, the windowed bone grafting square tube can make the windowed end and the bone grafting end respectively face downward by reversing the adjustment method. Then, the windowing operation and bone grafting operation on the femoral neck can be completed in sequence by making the windowed end and the bone grafting end respectively face downward, thereby realizing the combination of the two tools of windowing and bone grafting into one, without the need to prepare multiple tools, which is conducive to the smooth operation of the windowed bone grafting surgery.

[0018] The beneficial effects are as follows: 1. The utility model is provided with a detachable combination of a holding handle and a window bone grafting square tube at the upper and lower positions of the connecting square tube through a combined connecting piece, and then the holding handle is hammered to drive the window end of the window bone grafting square tube facing downward to press down the femoral neck, so that a rectangular bone grafting window can be directly chiseled out at the femoral neck position, replacing the windowing operation method of sequentially chiseling off the four sides, ensuring that the bone grafting window has an accurate size and a good degree of regularity, and facilitating the windowing operation process;

[0019] 2. The inner periphery of the window end of the fenestration bone grafting square tube is provided with a barbed elastic thorn piece. After the window opening operation is completed, the barbed elastic thorn piece will sink into and hook the outer edge of the chiseled bone, thereby ensuring that when the window opening bone grafting square tube is withdrawn after the window opening is completed, the window end can completely clean out the chiseled bone. The cleaning and removal method of the chiseled bone is simple and easy to implement, further facilitating the window opening operation process.

[0020] 3. After the window is opened, the limiting protrusion of the combined connector can be disengaged from the window limiting groove to separate the connecting square tube from the window bone grafting square tube. Then, the window bone grafting square tube can be turned around to adjust the bone grafting end of the window bone grafting square tube to a downward state. Since the window bone grafting square tube is a straight tube in the vertical direction, the bone grafting end can be matched with the bone grafting window to ensure accurate alignment before insertion, thereby facilitating the introduction of the bone grafting bone directly through the window bone grafting square tube as a bone grafting tunnel, thereby avoiding the situation where the bone grafting bone is deflected or the position is inaccurate during introduction.

[0021] 4. The fenestration and bone grafting square tube can be reversed to make the fenestration end and the bone grafting end face downward respectively. Then, by making the fenestration end and the bone grafting end face downward respectively, the fenestration operation and bone grafting operation on the femoral neck can be completed in sequence, realizing the combination of the two tools of fenestration and bone grafting into one, eliminating the need to prepare multiple tools, and facilitating the smooth operation of the fenestration and bone grafting surgery. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 It is an overall axonometric diagram of the present utility model;

[0024] Figure 2 This utility model Figure 1 Cross-section diagram Figure 1 ;

[0025] Figure 3 This utility model Figure 2 A local enlarged view of point A;

[0026] Figure 4 This utility model Figure 1 Cross-section diagram Figure 2 ;

[0027] Figure 5 This utility model Figure 4 A partial enlarged view of point B;

[0028] Figure 6 This utility model Figure 1 The front external view of

[0029] Figure 7 This utility model Figure 1 The left external view of

[0030] Figure 8 This utility model Figure 1 The right external view of

[0031] Figure 9 This utility model Figure 1 A top view of the exterior;

[0032] Figure 10 This utility model Figure 1 External view looking up.

[0033] The following are the descriptions of the reference numerals:

[0034] 1. Holding handle; 101. Matching square tube; 102. Handle limiting groove; 2. Connecting square tube; 3. Combined connector; 301. Limiting protrusion; 302. Toggle opening; 303. Toggle spring; 4. Window bone grafting square tube; 401. Window end; 402. Window limiting groove; 403. Bone grafting limiting groove; 404. Bone grafting end; 405. Elastic thorn. DETAILED DESCRIPTION

[0035] To make the purpose, technical solution, and advantages of the present invention more clear, the technical solution of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0036] See also Figures 1-10As shown, the utility model provides a new femoral head window bone grafting tool, comprising a connecting square tube 2, a matching square tube 101 and a window bone grafting square tube 4, the lower part of the matching square tube 101 and the upper part of the window bone grafting square tube 4 are inserted into the connecting square tube 2 in a vertical sliding fit manner, and a holding handle 1 is fixed to the top of the matching square tube 101, so that the holding handle 1 can be used as a force application position for hammering during window opening, and it is convenient to hold the holding handle 1 to hold the tool, and the upper and lower ends of the window bone grafting square tube 4 are respectively In order to align the bone grafting end 404 for inserting the bone grafting window with the window opening end 401 for pressing down the femoral neck to perform the window opening operation, the purpose of this arrangement is that the window opening and bone grafting square tube 4 can make the window opening end 401 and the bone grafting end 404 respectively face downward by reverse adjustment, and then the window opening operation and bone grafting operation on the femoral neck can be completed in sequence by making the window opening end 401 and the bone grafting end 404 respectively face downward, thereby realizing the combination of the two tools of window opening and bone grafting into one.

[0037] See also Figure 1-Figure 5As shown, the upper and lower positions on both sides of the connecting square tube 2 are combined with combined connectors 3, and the matching square tube 101 and the window bone grafting square tube 4 are detachably connected with the connecting square tube 2 through the corresponding combined connectors 3. Specifically, the top and bottom sides of the window bone grafting square tube 4 are respectively provided with window limiting grooves 402 and bone grafting limiting grooves 403, and the combined connectors 3 can respectively cooperate with the window limiting grooves 402 and the bone grafting limiting grooves 403 to make the connecting square tube 2 and the window bone grafting square tube 4 removable. Removable plug-in, handle limiting grooves 102 are provided on both sides of the matching square tube 101, and the combined connector 3 can make the connecting square tube 2 and the matching square tube 101 detachable and plug-in by cooperating with the handle limiting grooves 102. The combined connector 3 includes a toggle opening 302 and a toggle spring 303. The upper and lower positions on both sides of the connecting square tube 2 are provided with a toggle opening 302, and the inner edge of the toggle opening 302 is fixedly connected with a toggle spring 303 that can be toggled, deformed and automatically restored. The inner surface of the toggle spring 303 is fixed with a limiting protrusion 301, which is away from the position where the toggle spring 303 is fixedly connected to the connecting square tube 2, and the limiting protrusion 301 at the upper position is respectively immersed in the handle limiting groove 102, and the limiting protrusion 301 at the lower position is respectively immersed in the window limiting groove 402. The effect of this arrangement is that the limiting protrusion 301 of the toggle spring 303 is respectively immersed in the handle limiting groove 102, the window limiting groove 402 and the bone graft limiting groove 40 3 can respectively realize the rapid combination and connection of the matching square tube 101 and the window bone grafting square tube 4 with the connecting square tube 2, and at the same time, by pulling up and pulling the spring piece 303, the limiting protrusion 301 is respectively disengaged from the handle limiting groove 102, the window limiting groove 402 and the bone grafting limiting groove 403, the matching square tube 101 and the window bone grafting square tube 4 can be smoothly slid and separated from the connecting square tube 2 respectively, realizing the rapid combination and disassembly operation of the matching square tube 101 and the window bone grafting square tube 4 with the connecting square tube 2.

[0038] See also Figure 1-Figure 5 As shown, the combined connector 3 and the window bone grafting square tube 4 are optimized as follows. Specifically, for the combined connector 3, the distance between the bone grafting limiting groove 403 and the outermost end of the window end 401 is equal to the distance between the window limiting groove 402 and the outermost end of the bone grafting end 404, so that when the bone grafting end 404 and the window end 401 are respectively plugged into the connecting square tube 2, the window limiting groove 402 and the bone grafting limiting groove 403 can be respectively engaged by the limiting protrusion 301 at the lower position. With this arrangement, it is ensured that when the window end 401 and the bone grafting end 404 are respectively at the lower end, the window bone grafting square tube 4 can be successfully combined and plugged into the connecting square tube 2 through the combined connector 3.

[0039] Specifically speaking of the windowed bone grafting square tube 4, the windowed bone grafting square tube 4 is a rectangular straight tube, and the bone grafting end 404 of the windowed bone grafting square tube 4 is a flat end face, and the windowed end 401 of the windowed bone grafting square tube 4 is an oblique end face or a curved end face with a protruding edge. With such a configuration, first, the bone grafting end 404 cooperates with the bone grafting window so that the windowed bone grafting square tube 4 can be accurately aligned with the bone grafting window and then inserted, thereby facilitating the introduction of bone grafting bones directly through the windowed bone grafting square tube 4 as a bone grafting tunnel, and at the same time, facilitating that both the bone grafting end 404 and the windowed end 401 of the windowed bone grafting square tube 4 have good and appropriate use effects. Further optionally, a plurality of elastic barbs 405 in the shape of barbs are fixed on the inner periphery of the window bone grafting square tube 4 near the window end 401. Preferably, the elastic barbs 405 are elastic metal sheets that can be squeezed, deformed and automatically restored. If so, after the window opening operation is completed, the elastic barbs 405 in the shape of barbs will sink into and hook the outer edge of the removed bone, thereby ensuring that when the window bone grafting square tube 4 is withdrawn after the window opening is completed, the window end 401 can completely clean and remove the removed bone, and the method for cleaning and removing the removed bone is simple and easy to implement.

[0040] The above structure is used in the process of femoral head window bone grafting surgery. Since the upper and lower positions of the connecting square tube 2 are detachably combined with the holding handle 1 and the window bone grafting square tube 4 through the combined connecting piece 3, the holding handle 1 is hammered to drive the window end 401 of the window bone grafting square tube 4 to press down the femoral neck, so that a rectangular bone grafting window can be directly chiseled out at the femoral neck position, replacing the window operation method of chiseling out the four sides in sequence, ensuring that the bone grafting window has an accurate size and good regularity. The degree of integrity is improved, which facilitates the window opening operation process. Since the window opening end 401 of the window bone grafting square tube 4 is provided with a hook-shaped elastic thorn piece 405 at the inner periphery, after the window opening operation is completed, the hook-shaped elastic thorn piece 405 will sink into and hook the outer edge of the chiseled bone, thereby ensuring that when the window opening square tube 4 is withdrawn after the window opening is completed, the window opening end 401 can completely clean out the chiseled bone. The method for cleaning and removing the chiseled bone is simple and easy to implement, which further facilitates the window opening operation process. After the window opening is completed, the window end 401 can be assembled and removed. The limiting protrusion 301 of the connecting piece 3 is disengaged from the window limiting groove 402 so that the connecting square tube 2 and the window bone grafting square tube 4 can be separated. Then, the window bone grafting square tube 4 can be turned around so that the bone grafting end 404 of the window bone grafting square tube 4 is adjusted to a downward state. Since the window bone grafting square tube 4 is a straight tube in the vertical direction, the bone grafting end 404 can be matched with the bone grafting window so that the window bone grafting square tube 4 can be accurately aligned with the bone grafting window and then inserted, so that it is convenient to use the window bone grafting square tube 4 directly as a bone grafting tunnel. The introduction of the bone grafting bone avoids the situation where the introduction of the bone grafting bone is skewed or the position is inaccurate. In this way, the window opening and bone grafting square tube 4 can be adjusted in reverse so that the window opening end 401 and the bone grafting end 404 are respectively in a downward state. Then, the window opening operation and bone grafting operation of the femoral neck can be completed in sequence by the window opening end 401 and the bone grafting end 404 are respectively in a downward state, thereby realizing the combination of the two tools of window opening and bone grafting into one, without the need to prepare multiple tools, which is conducive to the smooth operation of the window opening and bone grafting surgery.

[0041] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A new femoral head fenestration bone grafting tool, characterized by: It comprises a connecting square tube (2), a matching square tube (101) and a window bone grafting square tube (4), wherein the lower portion of the matching square tube (101) and the upper portion of the window bone grafting square tube (4) are both inserted into the connecting square tube (2) in a vertical sliding fit manner, and a holding handle (1) is fixed to the top end of the matching square tube (101); The upper end and lower end of the fenestration bone grafting square tube (4) are respectively a bone grafting end (404) capable of being aligned and inserted into the bone grafting fenestration and a fenestration end (401) capable of performing a downward pressing fenestration operation on the femoral neck; Combined connectors (3) are provided at upper and lower positions on both sides of the connecting square tube (2), and the matching square tube (101) and the window bone grafting square tube (4) are both detachably connected to the connecting square tube (2) via the corresponding combined connectors (3).

2. The novel femoral head fenestration and bone grafting tool according to claim 1, characterized in that: The top and bottom sides of the window bone grafting square tube (4) are respectively provided with window limiting grooves (402) and bone grafting limiting grooves (403), and the combined connecting piece (3) can respectively cooperate with the window limiting grooves (402) and the bone grafting limiting grooves (403) to enable the connecting square tube (2) and the window bone grafting square tube (4) to be detachably connected.

3. The novel femoral head fenestration and bone grafting tool according to claim 2, characterized in that: Handle limiting grooves (102) are provided on both sides of the matching square tube (101), and the combined connector (3) can be engaged with the handle limiting grooves (102) to enable the connecting square tube (2) and the matching square tube (101) to be detachably connected.

4. The novel femoral head fenestration and bone grafting tool according to claim 3, characterized in that: The combined connecting parts (3) each include a toggle opening (302) and a toggle spring (303), the toggle openings (302) are provided at upper and lower positions on both sides of the connecting square tube (2), and the inner edge of each toggle opening (302) is fixedly connected with the toggle spring (303) capable of toggle deformation and automatic restoration, the inner surface of the toggle spring (303) is fixed with a limiting protrusion (301), the limiting protrusion (301) is away from the position where the toggle spring (303) is connected to the connecting square tube (2), and the limiting protrusion (301) at the upper position is respectively sunk into the handle limiting groove (102), and the limiting protrusion (301) at the lower position is respectively sunk into the window limiting groove (402).

5. The novel femoral head fenestration and bone grafting tool according to claim 4, characterized in that: The distance between the bone grafting limiting groove (403) and the outermost end of the window opening end (401) is equal to the distance between the window opening limiting groove (402) and the outermost end of the bone grafting end (404), so that when the bone grafting end (404) and the window opening end (401) are respectively plugged into the connecting square tube (2), the window opening limiting groove (402) and the bone grafting limiting groove (403) can be respectively engaged by the limiting protrusion (301) at the lower position.

6. A new femoral head fenestration and bone grafting tool according to any one of claims 2 to 5, characterized in that: The windowed bone grafting square tube (4) is a rectangular straight tube, and the bone grafting end (404) of the windowed bone grafting square tube (4) is a flat end face, and the windowed end (401) of the windowed bone grafting square tube (4) is an oblique end face or a curved end face with a protruding edge.

7. The novel femoral head fenestration and bone grafting tool according to claim 6, characterized in that: A plurality of elastic barbed thorn pieces (405) are fixed on the inner periphery of the window bone grafting square tube (4) at positions close to the window end (401).

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